锈蚀对加固构件加载裂缝开展的影响  

THE INFLUENCES OF CORROSION DAMAGE ON THE FATIGUE CRACK DEVELOPMENT OF CONCRETE STRUCTURES

作　　者：徐冲[1] 孙晓燕[2] 

机构地区：[1]汉嘉设计集团股份有限公司,杭州310005 [2]浙江大学建筑工程学院,杭州310058

出　　处：《低温建筑技术》2012年第7期43-45,共3页Low Temperature Architecture Technology

基　　金：国家"863"高技术研究发展计划资助项目(2007AA04Z437);国家自然科学基金项目(50808158);浙江省重点科技创新团队(2010R50034);浙江省自然科学基金项目(Y107049);高等学校博士学科点专项科研基金(200803351117)

摘　　要：桥梁构件在实际工作时往往带损伤工作,为了研究锈蚀损伤对加固构件在实际超载运营时的裂缝开展影响,文中开展了基于实际车辆荷载谱下多组钢筋混凝土构件疲劳试验研究。试验结果表明,碳纤维加固仍能有效提高钢筋混凝土构件的抗裂能力,严重超载下锈胀裂缝对疲劳裂缝的影响较大,建议对锈胀裂缝进行处理。Bridge members always work with damage. To study the influence of corrosion damage on the crack development of bridge members after reinforcement, a fatigue experiment is carried out to sim- ulate the members under overloading. The results indicts that CFRP reinforcement can effectively im- prove the crack resistance of reinforced concrete members. However, corrosion cracks width increases quickly in serious state. It is suggested that corrosion cracks should be handled in seious state.

关 键 词：锈蚀损伤 桥梁构件 加载裂缝 CFRP加固 

分 类 号：TU312.3[建筑科学—结构工程]